If I lose my phone, how can I track it?

The Android Device Manager app assists with locating your lost or misplaced devices and helps you keep your information safe and secure. Data, pictures, documents and more can all be erased with this simple app. You now have access to do so right at your finger tips.

Visit Apple's official support site that provides information on how to sign in at iCloud.com to find your missing device, step by step information on how to download the application and to learn more about Activation Lock here - Find My iPhone Support